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zepelin [54]
3 years ago
7

Please help me with this question.

Mathematics
1 answer:
CaHeK987 [17]3 years ago
4 0

Answer:

24

Step-by-step explanation:

Let's say that R, N, and M are the ages of Ric, Nancy, and Michael in 1980.

We can write three equations:

R = 2N

N = 2M

(R + 12) + (N + 12) + (M + 12) = 78

Simplify the third equation:

R + N + M + 36 = 78

R + N + M = 42

Substitute the first equation:

2N + N + M = 42

3N + M = 42

Substitute the second equation:

3(2M) + M = 42

6M + M = 42

7M = 42

M = 6

Therefore:

N = 12

R = 24

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if a 35 year old women has averaged 8 hours of sleep each 24 hours how many days of her life has she spent
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(-2, 1)  

(2, 5)  

Please solve the third question and answer in the comments and I will tell you if you are correct.

Step-by-step explanation:

1)Find the solution of the following system of equations; express the answer as a coordinate pair (x,y):

y = x + 3         subtract from the bottom  and solve for x

y = -2x - 3    

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2)Find the solution of the following system of equations; express the

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y = x/2 + 4

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 0  = x(2-1/2) - 3

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3) Find the solution of the following system of equations; express the

answer as a coordinate pair (x,y):

y = -3x + 6          subtract from the bottom  and solve for x

y= -1/2x+1            

y-y = x(-3 - (-1/2)) + (6 - 1)       follow the examples above

6 0
3 years ago
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